Ž Abstract: In this study, silica-based packing materials with pore sizes herein ̊ . referred to primarily as channel diameters, d ranging from 60 to 4000 A were ch utilized to elucidate the role of pore size in CEC. Separations were conducted using a commercially available CE system, the inlet and outlet buffer reservoir compartments having been modified to allow constant application of ;150 ps...

In this paper, we introduce a new interconnection network, the dual-cube, its topological properties, and the routing/broadcasting algorithms in the dual-cube. The advanced subjects such as fault-tolerant routing and constructing multiple disjoint paths in dual-cubes are also included in this paper. The binary hypercube, or r-cube, can connect 2r nodes. In contrast, a dual-cube with r links for...

ActiveCube is a bi-directional user interface that supports a person's creative work through constructing and interacting with 3-D virtual objects by using actual physical cubes. With this flexible interface, the user can easily construct various 3-D structures in a virtual environment by simply combining the cubes. All of the faces of the cubes are the same and can be connected to any face of ...

Confinement of water by pore geometry to a one-dimensional file of molecules interacting with the pore alters the diffusion coefficient D(W). Here we report an exponential dependence of D(W) on the number of water positions in the pore. The result is based on measurements of single channel water permeabilities of structurally similar peptidic nanopores of different length. The inconsistency wit...

wellbore instability is a quite common event during drilling, and causes many problems such as stuck pipe and lost circulation. it is primarily due to the inadequate understanding of the rock properties, pore pressure, and earth stress environment prior to well construction. this study aims to use the existing relevant logs, drilling, and other data from offset wells to construct a precise mech...

Inclusion-based formulations allow an explicit description of pore geometry by viewing porous rocks as a solid matrix with embedded inclusions representing individual pores. The assumption commonly used in these formulations that there is no fluid pressure communication between pores is reasonable for liquid-filled rocks measured at high frequencies; however, complete fluid pressure communicati...

Previous numerical experiments are extended to more complex surfaces and in some cases to nonzero gravity. 1. The Mathematical Problem Let be the unit cube in R 3. We are considering subdomains having a piecewise smooth boundary @ = ? , where ? is a subset of the interior of and is a subset of the boundary @ of. We are looking for those subdomains which solve the following variational problem: ...